Oil filter cartridge



1952 o. P. SATHER on. FILTER CARTRIDGE Filed June 20, 1949 j 2 SHEETS-SHEET 1 H 4 5 INVENTOR O. P SATHER ATTORNEY Oct. 21, 1952 o. P. SATHER 1 OIL FILTER CARTRIDGE Filed June 20, 1949 2 SHEETS-Sl-IEET z g AL! l7 gt INVENTOR 137. 2 A O P SATHER BY .Q k 1 A 'TATTORNEY Patented Oct. 21, 1952 "QIHJFILTER cnnrnmeira .onnmsamr, Duluth Mimr-r; Alllll atio'nJunel'fll; isiogseiiarnorlounge:

'Thisinvention relates tofilters, =and hasspecialreference to a removable cartridge for: oil' 'filtersu Itii's well known that engines require :a lubrieating-system, and in late years,--filters -have been provided in the systemtoclarify the oil used con'- tinuously so th'at as-muchiuseas possible :may be obtained-Trom-agiven:quantity. of oil; 'Someoffthe oi ltfiltersmow;haveaa;removable cartridgewithin:v

theifilter. casing=,:andthisecartridge:contains the filtering; mediums (usually cotton: waste or wood:

pensive; materiaizand constructionzas: possible, as thescartridgegmustbe discarded andireplaced with. arr-zentirely;newacartridgeeafter: beingzused for: ar' givem:period,;;as: the rfilteringramediiim;:becomes'. saturated with dirt collected from the1:oi'l;jas:;itlx

passesgztherethrough;;;and soon loses its ability to filter efficiently.

It is one ofimy..zprincipal.objectsrto provide a cartridgeoffsimple constructionesojthat .aiski'llled technician is not required to repack same;

Another objectisto provide.,a ..r,epackable filter cartridge whichis-of-sturdy'construction so that it may-he handled repeatedlypahd yet is not :expensivein.comparisomto:fiitericartridges now in user.

Another object is to provide a filter cartridge of knock-down construction which may be assembled and knocked down quickly and easily.

These and other objects and advantages will become more apparent as the description of the invention proceeds.

In the accompanying drawing forming a part of this application:

Fig. 1 is a vertical central sectional view of an oil filter showing my invention in operating position.

Fig. 2 is an elevational view of my assembled filter cartridge.

Fig. 3 is a top plan view of Fig. 2.

Fig. 4 is a perspective view of the cover retainer means.

Fig. 5 is an enlarged vertical sectional view of one lower corner of my cartridge showing the screen carrying means.

In the drawing the reference numeral I indicat-es the oilfilter*casi'ng in which the oil fiiter; cartridge is carried?+when='-inuse, it i being zzwe'lli known that in operation the dirty oil is pumped through th'e inlet =Z into the :casing lwh'erez itipasses *th-roughth'e filtering medium 3. and; back intcthe-'o'i1system through 3119 011131611;-

-It' is common-construction= of oil: filterstm have:

a rod 5 'mounted vertically in: the casing-. l;.; on which the filter cartridge is carried, :and which... has atliread'ed upper endtc receive 1the 11111116: I

which h'old's the cover of theefilter casing firmly: in place;

filter cartridgezcomprises a 'centralistem or:

tube -8'- -Which hasalongitudinal"borerll? therein: which -is closed-iat 'one end; and vwhich: connects:

.with the -outlet: 4 at thei-opposite;-;end-;: therebeinsr suitable holes: I fl through thegtubegto. permitclean:

oil filtered byuthe-filteringmediumntm entemthe:

bore, a suitable bushingw iii-being providedontthe; lower end "of: the tubezrlliand-sanother bushing; I 2 at' the upper end ofithe tube'rillto receive:;theirodi: fikiwhen I-the: cartridge-is: in placetas: showni: fI he-base;-; lsiis. provi'ded with aipreferably cine-- cumferential groove l:dzwhiclmprovidesz'meansrtoi hold:the::screen:. l:5f-ofi:the; filter; cartridge iII'iCOII-I" edgeiof: the .screen; Eithersa; pluralityzofi,spaced,;j inwardlypr iecting lueszmayrbeaweldedtcrother-- wise provided on the?lowen edge*ofitherscne mmr.. a length of wire (not shown) may. berzwelded; alongnthe lowerinnen edge of: thescreemior the lower edgezof the screemmayibeyrolleli inwardly:

tomrovidelthernecessaryzflangeztozbe receivedvinr thezgraove; l 4 tto; hold: .the;;scr een;= in; place om the g base l3... Thegscreen I5'.is preferably made ofgonez piece v:of rzrelativelyaheavy rsauae zreticulatei sheet? metal so gas to; retain: its shape;undermepeatedi handling, and is formed to an elongated cylinder as shown. The edges of the metal screen l5 which come together to form the cylindrical shape are preferably'overlapped slightly as at [6 and a pair of spaced snap spring looks I! are provided to hold the screen cylinder tightly assembled. It is deemed apparent that the screen may be readily mounted on the base by placing the flange [5 within the groove I4 before the snap spring locks I"! are secured to hold the screen in its desired cylindrical shape and firmly in the groove making a very rigid assembly.

The upper end of the tube 8, carries a cover l8 which has an axial hole therein to receive the bushing I2, and has a pivotal handle I9 secured thereto to provide ease in handling the cartridge. The cover is preferably held on the tube 8 by means of substantially U-shaped spring wire retainer 20 which is sprung into the annular groove 2| in the periphery of the tube just above the cover. This retainer 20 provides a secure fastening to hold the cover from being pulled off of the tube 8 when carrying the cartridge by the handle 19 holds the cover firmly against the filtering medium, and also permits ready removal of the cover from the tube by merely slipping the retainer out of the groove and off of the tube. It is to be noted that the cover it is of less diameter than the screen cylinder l5 and fits just below the upper end of the screen to facilitate the packing of the filtering medium.

The cover 18 is prevented from sliding down the tube 8 when installed thereon, obviously, by its engagement with the filtering medium 3, and

in addition, a leather seal 22 is provided in a suit-' able recess in the cover and is held in place by a spring ring 25, and this seal prevents dirty oil from leaking onto the cartridge along the tube 3 and also is sufficiently tight to frictienally hold the cover in its uppermost positionwhen no filtering medium is in the cartridge.

It is deemed apparent that with the cover I8 removed, and the screen It opened and removed from the base, old and dirty filtering material may be easily and very quickly removed from around the tube 8, by merely sliding same therefrom away from the base. In addition the filter may be easilyand quickly repacked with new filtering material by re-mounting the screen 15 on the base [3 and securing the snap locks 11, then packing the filtering material in through the open end of the cartridge in the open area between the tube 8 and the screen 15. After the cartridge is filled the cover [8 may be put on and pressed firmly against the filtering medium and the retainer 29 sprung into place in the groove 2i to hold the cover in place and the cartridge is ready for re-use as desired.

Using my cartridge, the only waste involved is in the filtering medium which cannot be reclaimed economically. No metal is thrown away as in the present throw away cartridge and due to the durable construction of my cartridge it will last the life of the vehicle on which it is used, and permit change of filter material more frequently due to lower cost, and this, of course, will prolong the useful life of the lubricating oil as the vehicle itself due to its having more clean lubricating oil.

In operation, it is deemed apparent that oil will enter the casing I through the inlet 2, pass through the screen 15 and filter medium 3 and into the bore 9 by way of the holes 10 in the tube 8. The rod 5 is hollow to a point adjacent the upper end thereof as shown, and an opening 24 is provided in the rod adjacent the upper end 4 thereof to permit oil to enter the rod and p ss through the outlet 4 and back into the lubricating system.

The lower end of the rod 5 has a flange or collar 25 which abuts the bottom of the casing when the rod is in place, and the bushing H has a collar 26 corresponding to the flange 25, and to seal the connection between the rod 5 and the tube 8 so that dirty oil cannot enter the tube a cork gasket 2'! is placed between the two collars as shown.

Having thus described my invention, what I claim is:

A repackable oil filter cartridge comprising a relatively thin metallic disc base having a groove in the periphery thereof, an elongated hollow cylinder of metallic mesh material carried by said base and extending therefrom in a direction normal to the plane of said base whereby a container is formed to receive filter material, a flange extending inwardly from one edge of'said cylinder and into said groove to provide the mounting for said cylinder on said base and to rigidify the normal shape of said container, a tube carried centrally of said base and extending within and substantially axially of said cylinder, a cover carried by said tube to close the upper end of said container, said cylinder being split longitudinally, and fasteners for securing the longitudinal edges of said cylinder together to clamp same securely in place on, said base and to release said edgesto permit said cylinder to be sprung open whereby it may be readily removed from said base and whereby filter material packed therewithin may be readily removed therefrom.

OLAF P. SATHER.

REFERENCES CITED The following references are or record in the file of this patent:

UNITED STATES PATENTS Number Name Date 575,478 Haefner Jan. 19, 1897 858,154 Conversy June 25, 1907 1,225,993 Mullaneyul 1 May 15, 1917 1,371,422 Isidor Mar. 15, 1921 1,941,982 Gill Jan. 2, 1934 2,223,70 Olson et a1 Dec. 3, 1940 2,487,146 Lasky Nov. 8, 1949 i FOREIGN PATENTS Number Country Date 2,126 Great Britain 1907 346,094 France Sept. 7, 1904 

